期刊
NUCLEIC ACIDS RESEARCH
卷 28, 期 18, 页码 3504-3510出版社
OXFORD UNIV PRESS
DOI: 10.1093/nar/28.18.3504
关键词
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The Escherichia coli H-NS protein is a nucleoid-associated protein involved in gene regulation and DNA compaction. To get more insight into the mechanism:of DNA compaction we applied atomic force microscopy (AFM) to study the structure of H-NS-DNA complexes. On circular DNA molecules two different levels of H-NS induced condensation were observed. H-MS:induced lateral condensation of large regions of the:plasmid. In addition, large globular structures were identified that incorporated a considerable amount of DNA. The formation of these globular structures appeared not to be dependent on any Specific sequence, On the basis of the AFM images, a model for global condensation of the chromosomal DNA by H-NS is proposed.
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